01 - Preheat oven to 400°F. Position the rack in the center of the oven for even heat distribution.
02 - Pat the chicken thighs thoroughly dry with paper towels. Combine the salt, black pepper, smoked paprika, dried thyme, and dried basil, then season all sides of each thigh evenly.
03 - Melt the butter in a large oven-safe skillet over medium-high heat. Place the chicken thighs skin side down and sear for 3 to 4 minutes until the skin turns golden and crisp. Flip each piece and sear the opposite side for 2 minutes. Transfer the chicken to a plate and set aside.
04 - In the same skillet, sauté the chopped onion for 2 minutes until softened. Add the minced garlic and cook for 1 minute until fragrant, stirring to prevent burning.
05 - Pour in the chicken broth, scraping up any browned bits from the bottom of the pan. Stir in the heavy cream and grated Parmesan cheese, whisking gently until the sauce is smooth and begins to thicken slightly.
06 - Nestle the seared chicken thighs back into the skillet, skin side up. Spoon some of the cream sauce over the top of each thigh to keep them moist during baking.
07 - Transfer the uncovered skillet to the oven. Bake for 25 to 30 minutes until the chicken reaches an internal temperature of 165°F and the sauce is bubbly and lightly golden on top.
08 - Remove from the oven and let rest briefly. Garnish with freshly chopped parsley and serve immediately while hot.